Improvement in grate-bars



l. A. SINCLAIR.

YGrate-Bars.

Patented'Feb. 4,1873.

UNITED ASTATES PATENT OFFICE JAMES A. SINGLAIR, OF BRIDGEPORT, ASSIGNOR TO HIMSELF AND MATTHEW C. MCKEOWN, OFBARNESVILLE, O HIO.

AIMPRovrslvIEiv-r IN GRATE-BARS.

Specication forming part of Letters Patent No. 135,447, dated February 4, 1573.

To all whom it may concern:

Be it known that I, JAMES A. SINCLAIR, of Bridgeport, in the county of Belmont and State of Ohio, have invented au Improvement in Grates, of which the following is a specification:

The invention relates to improvement in the class of grates wherein the several bars l composing the same are arranged to reciprocate in reverse directions alternately; and the object in view is to so construct and arrange the gratebars and the devices for reciprocating the same as to secure the greatest economy ot'space vertically-so important in furnaceswith a minimum number of parts, so connected that removal or substitution may be effected easily and quickly.

Figure l is a top view; Fig. 2 is a vertical section through line w m, Fig. l, and Fig. 3 is a detail View of the bar.

A represents an ash-box, and B the grate above it. C are the bars, having a vertical pin, c, on the under side of one end, and a projection, o', on the other end. D is a cross-bar, pivoted at the middle to a support, D, and havinga perforation for each grate-bar C. E is a plate or cross-bar, provided with guidelugs e on the upper sides, between which slide the projecting ends a of grate-bars. Ff1L is a horizontally-movable lever, having its short arm f1 at right angles to the long arm Fin a diti'erent horizontal plane, and having the two connected by a pivot, f2, which passes through support D. 'lhe end of this short arm f1 is pivoted, by means of a pin, c, ot' one ot' the grate-bars, to the swinging cross-loar l).

The operation is as follows: When the gratebars C expand their length is simplyr increased, and their end projections c caused'to protrude a little further through the guides e, and vice versa. Again, when a deposit has gathered on the grate-bars, and each is individually moved in a lateral direction back and forward, no deposit is left, but they are thoroughly cleaned.

The grate-bars C are made with upwardlyprojecting lugs C2, having intervals between them, and either cast with the bar or detachably bolted thereto. bars from the intense heat, while they then:- selves can be readily replaced.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

The right-angled lever F f, the parallel bearing-bar D centrally pivoted at a', a-nd the grate-bars G pivoted at their front ends and sliding at their rear ends, all arranged as shown and described.

JAMES A. SIN CLAIR.

Witnesses:

JOHN H. STAMP, CHARLES W. SINCLAIR.

These lugs shield the 

